The life span of Thai betta fish is about 2-4 years, but how long they can live depends on the living environment and the way of breeding. If the breeder can ensure that they live in a comfortable environment and feed reasonable food, then they can live longer, about three years. Some people with good physique can live for about 4 years. If they live in a poor environment, such as frequent changes in water temperature and quality and insufficient food, their life span will be shorter, only about two years.

If breeders want Thai betta fish to live longer, they must first ensure that their living environment is stable and comfortable. The second is to ensure that they have enough food. Finally, they should be checked regularly to avoid getting sick.

Thai betta is a small tropical fish, and its body size is relatively small. Even in adulthood, its body length can only grow to about 5-8 cm. There are also some Thai betta fish, which can reach a body length of about 10 cm in adulthood. If breeders want them to live longer, they'd better prepare enough space for them to move. They should also be provided with a comfortable living environment and sufficient food, so that they will be bigger in adulthood.